The statement that best summarizes the main events in the passage is this: D. Benedick overhears his friends talking about Beatrice's love for him and wonders if he could ever love her back.
Why this is the best summary
In the context of "Much Ado About Nothing," statement D is the most accurate summary of the main events leading to Benedick and Beatrice's eventual romance. Benedick eavesdropping on his friends' conversation about Beatrice's secret love for him is the pivotal moment that triggers his internal conflict and sets the stage for their relationship's development.
The statement in option D emphasizes Benedick's internal questioning and wonder about reciprocating Beatrice's feelings. This is the main driving force behind his subsequent actions and transformation throughout the play.